So its going to be a while since I will be able to play Dark Souls due to a accute case of Skyrimitis (downloading at the moment ..... :D) , I decided to take this chance to relay my favorite PVP stories from my part:

Well I decied to kill Gwendolyn , so as you know you get to dark Anor Londo and hence you become hunted by a lot of players from the darkmoon covenant ( I think so) , since my first playthrough was throught the way of the white covenant I hardly had PVP encounters , so I wanted to quench my blade with other players souls. By this time I was right outside Dark Sun Gwendolyn bonfire but I was hesitant to go inside to beat the boss , as I was at the bonfire adjusting my magic I get kicked out of the menu due to an invasion. A smart player would´ve dashed to the boss fog , but as I said I wanted more PVP so I didn´t. As you know the central bridge was lowered , my adversary activated it .... so I told myself: " Fine let him come to me ... I got some Wrath of the god for him right here" , a minute passed and the bridge didnt move , so yeah the invader had no idea of were I was , heck I´ll go to him then. So I activate the bridge to lower it again , the bridge begins to move , but to my surprise the " you defeated " box appears .... :D I made him fall without knowing it , but I dont know if it was really my doing or he just killed himself. If the former then what a way to defeat an invader eh?

So after this victory I just went to fight more invaders , I was feeling good. Many fight latter I devised that my fights should be held on the rails inside were the painted world access is. It proved dangerous to me , but also gave me a better fighting chance against my opponents. But as you know under this circumstances you can get invaded (just like in the forest) by 2 people. So after some fights a couple invaded me , the cat and mouse game began and I lured them to the railings .... I casted my miracles and was on a great position , one of my oponents was using the stone knight shield , he was a warrior , and behind him was the spellcaster. In a rare instance of amazing team effort , the knight was blocking all my miracles and attacks while the spellcaster shot me with magic. I don´t know why , but even if I lost that battle that team effort was so cool to see , and I vow to the cunning of those 2 warriors.

My last story and my favorite just happened last night ... I was on my NG++ so after the Northern Asylum I went to the catacombs , I was clearing the place and exploring. As I reached the first bridge that you can turn (and already did by this time) I get invaded , I think to myself .... oh boy this maybe the time I can put my theory to the test .... what theory? Read on duders. I stayed were the switch was , tried to conceal my body as best as possible , then I see my enemy dashing through the stage ... he reaches the bridge and begins to cross it but he stops .... as he pauses I can imagine his thoughts "Wait a second .... the skelletons are still here ... even the fire shooting dude ... where the hell is him?" As he ponder this questions I TURN THE SWITCH .... the bridge begins to turn exposing the dark soul to the depths , he fells and I just imagine his face of "oh crap!!!!" as he plunders in to the floor and dies. Oh it was so beautifull my fellow droogiess!!!! Hollywood couldn´t have planned it better.

There you go, these are my highlights on this PVP business in Dark Souls .... so my fellow dark soulers .... what stories of defeat , victories and what not do you have to share? And yes Dark Souls is an effin amazing game!!!!!

Flipping the switch is a pretty cool way to off an invader - my hat goes off to you. 
I got mixed up in a bunch of the Multiplayer this weekend, though it was more co-op flavored, still had a few bouts of pvp - I started up a new character, with the intent to join the Sunlight Covenant, which means either lots of FTH or lots of coop.  But since this is about dueling I'll skip over all that Jolly Cooperation and get to the down and dirty fights.
 
As I was making my way through Undead Burg I saw something I'd never seen before - the Mark of a Gravelord Servant - I ran back to the Bonfire to recharge my Fireballs and then proceeded to drop the two skeles outside and invade Nito's Chosen. He wasn't ready - he was standing there, just outside the Bonfire where the Archer spawns - with his back to me. I'm not sure if you get a notice messing w/ the Death Orbs or not, but my first two fireballs caught him off guard and left him seriously hurting. He rushed at me - foolishly - and a well timed dodge sent him flying off the bridge that leads to the fire. Souls, Humanity and a Death Orb for the victor. 
 
A bit later I was running around in Human form, feeling pretty confident (a good sign something bad is about to happen) when I reached the Gargoyles. I was happy to see many people beyond the faithful Knight Solaire waiting to be summoned. I picked up a rather bulky Wanderedand a Red Headed Witch who seemed oddly out of place. As The Wanderer and I are waiting for the Witch to be summoned we see an Invasion notice - somehow this guy is level 14-18 and running around in Sygmound's Armor (the bulky Onion Knight guy) and wielding some pretty serious Pyromancy. He spawns on the middle level (between the two ladders up) and quickly realizes where he is - the Witch gets summoned at the perfect time.....to get back stabbed and one-shotted by our invader. The Wander is waiting for me to make my move - pretty silly if you think about it, should I die he loses too. I go for a diving attack only to have the Flaming Onion dodge roll down to the next level. The Wanderer drops down next to me - the three of us wait, staring at each other. The Wanderer goes for a leaping attack only to miss, I drop down quickly behind him, the Invader is ready and sets off a Firestorm spell, completely destroying myself and The Wanderer. 
 
One win, one lose and about 8 sessions of Co-Op boss dropping rounded out my Mulitplayer Dark Souls weekend.

@SteamPunkJin: That dodge kill sounds really hilarious XD .... if a game neede some type of recording option this would be it

Anymore takers? I would like to hear your stories